Sony KV-XG25M80 Service manual

SERVICE MANUAL

BG-3R

CHASSIS

MODEL COMMANDER DEST. CHASSIS NO.

KV-XG25M80 RM-952 ME SCC-U48E-A

MODEL COMMANDER DEST. CHASSIS NO.

3

1

2

6

4

5

9

7

8

JUMP

-

0

2

SOUND

PROGR

MODE

FAVORITE

TV

TRINITRON

®

COLOR TV

KV-XG25M80

RM-952

Power requirements 110-240 V AC, 50/60 Hz Power consumption (W) Indicated on the rear of the TV Television system B/G, I, D/K, M Color system PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58 Channel coverage

B/G VHF: E2 to E12 / UHF: E21 to E69 / CATV: S01 to S03, S1 to S41 I UHF: B21 to B68 / CATV: S01 to S03, S1 to S41 D/K VHF: C1 to C12, R1 to R12 / UHF: C13 to C57, R21 to R60

M VHF: A2 to A13 / UHF: A14 to A79 /

˘˘

˘ (Antenna) 75-ohm external terminal

˘˘

Audio output 5W + 5W Number of terminal

D (Video) Input: 3* Output: 1 Phono jacks; 1 VP-P, 75 ohms * Two input lines available ≥ Audio Input: 3* Output: 1 Phono jacks; 500 mVrms * Two input lines available 2 (Headphone) Output: 1 Stereo Minijack

Picture tube 25 inch

Tube size (cm) 64 Measured diagonally Screen size (cm) 60 Measured diagonally

Dimension (w/h/d, mm) 722 × 515 × 512 Mass (kg) 39

SPECIFICATIONS

Note

CATV: S01 to S03, S1 to S41, Z1 to Z39

CATV: A-8 to A-2, A to W+4, W+6 to W+84

CAUTION

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.

Design and specifications are subject to change without notice.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE SCHEMA TIC DIA GRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

– 2 –

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically begin to flash. The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.

1. DIA GNOSTIC TEST INDICA TORS

When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the lamp will identify the first of the problem areas.

Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a “0”.

SELF DIAGNOSTIC FUNCTION

Diagnostic

Item

Description

• Power does not turn on

• +B overcurrent (OCP) or overvoltage (OVP)

• Vertical deflection stopped

• Horizontal deflection overdrive

• White balance failure (no PICTURE)

• Micro reset

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

5 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or 002:001~255 003:001~255 004:001~255

at the same time

005:000 or 005:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not plugged in.

• Fuse is burned out F8601 (B6)

• H.OUT Q511 is shorted. (A board)

• IC1800 is shorted. (C6 board)

• -13V is not supplied. (A board)

• IC 503 faulty (A board)

• G2 is improperly adjusted. (Note 2)

• CRT problem.

• Video OUT Q701~Q709 is faulty. (C6 board)

• IC301 is faulty. (A board)

• No connection A board to C6 board.

• Discharge CRT (C6 Board)

• Static discharge

• External noise

Detected

Symptoms

• Power does not come on.

• No power is supplied to the TV.

• AC power supply is faulty.

• Power does not come on.

• Load on power line is shorted.

• Has entered standby state after horizontal raster.

• Vertical deflection pulse is stopped.

• Power line is shorted or power supply is stopped.

• No raster is generated.

• CRT cathode current detection reference pulse output is small.

• Power is shut down shortly, after this return back to normal.

• Detect Micro latch up.

Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.

The symptom that is diagnosed first by the microcontroller is displayed on the screen.

Note 2: Refer to screen (G2) Adjustment in section 3-4 of this manual.

– 4 –

2. DISPLA Y OF STANDBY/TIMER LIGHT FLASH COUNT

2 times

5 times

KV -XG25M80

RM-952

Lamp ON 0.3 sec. Lamp OFF 0.3 sec.

Lamp OFF 3 sec.

STANDBY/SLEEP lamp

Diagnostic Item Flash Count* +B overcurrent/overvoltage 2 times Vertical deflection stopped

White balance failure 5 times * One flash count is not used for self-diagnostic.

3. STOPPING THE STANDBY/TIMER FLASH

Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER lamp from flashing.

– 5 –

KV-XG25M80

RM-952

4. SELF-DIAGNOSTIC SCREEN DISPLAY

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurances of failure for confirmation on the screen:

[To Bring Up Screen Test]

In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

[Screendisplay] / channel [5] / Sound volume [-] / Power ON

Self-Diagnosis screen display

˘

Note that this differs from entering the service mode (mode volume [+]).

SELF DIAGNOSTIC

002 : 000 003 : 000 004 : 000 005 : 001

101 : 000

Numeral "0" means that no fault has been detected.

Numeral "1" means a fault has been detected.

5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you have completed the repairs, clear the result display to “0”.

Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs.

[Clearing the result display]

To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the diagnostic screen is being displayed.

Channel [8] / 0

[Quitting Self-diagnostic screen]

To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

– 6 –

6. SELF-DIAGNOSTIC CIRCUIT

KV -XG25M80

RM-952

FROM

CRT

FROM

[+B] Q604

[V] Q509/507

IC301

Y/CHROMA JUNGLE

IK-IN

HP/

20 51

PROTECT

SDA

4637

IC001

SYSTEM

IO-8DAT

O-LED

IO-SDAT

MEMORY

54523

B-DAT

IC003

[+BovercurrentªOCPº] Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON

and the voltage to pin 20 of IC301 should go down when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.

[Verticaldeflectionstopped] Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001

shut down the power supply.

[Verticaldeflectionovercurrent] Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be

shut down when detect this by IC001.

[Whitebalancefailure] If the RGB levels* do not balance or become low level within 5 seconds, this error will be

detected by IC301. TV will stay on, but there will be no picture.

* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

– 7 –

KV-XG25M80

2

WARNING

• Dangerously high voltages are present inside the TV.

• Operate the TV only between 110 – 240 V AC.

To prevent fire or shock hazard, do not expose

the TV to rain or moisture.

Do not operate the TV if any liquid or solid object

falls into it. Have it checked immediately by

qualified personnel only.

Do not open the cabinet and the rear cover of the

TV as high voltages and other hazards are

present inside the TV. Refer servicing and

disposal of the TV to qualified personnel.

Your TV is recommended for home use only.

Do not use the TV in any vehicle or where it may

be subject to excessive dust, heat, moisture or

vibrations.

Do not block the ventilation openings of the TV.

Do not install the TV in a confined space, such

as a bookcase or built-in cabinet.

For children’s safety, do not leave children alone

with the TV. Do not allow children to climb onto

it.

Do not plug in too many appliances to the same

power socket. Do not damage the power cord.

Clean the TV with a dry and soft cloth.

Do not use benzine, thinner, or any other chemicals

to clean the TV. Do not scratch the picture tube.

For your own safety, do not touch any part of the

TV, the power cord and the antenna cable during

lightning storms.

Pull the power cord out by the plug. Do not pull

the power cord itself. Disconnect the TV before

moving it or if you are not going to use it for

several days.

3

GB

Using Your New TV

Do not install the TV in an unstable position.

Use a proper TV stand.

Do not place any objects on the TV.

WARNING (continued)

RM-952

GENERAL

SECTION 1

The operating instruction mentioned here are partial abstracts

from the Operating Instruction Manual. The page numbers of

the Operating Instruction Manual remain as in the manual.

– 8 –

KV -XG25M80

Using Your New TV

4

1

L(MONO)

R

VIDEO

VIDEO IN

VIDEO OUT

AUDIO

RL

R

L

VIDEO IN

VIDEO OUT

VIDEO

AUDIO

Using Your New TV

Getting Started

Step 1

Connect the antenna

If you wish to connect a VCR, see the Connecting a VCR diagram below.

IEC connector

(not supplied)

To video

and audio

outputs

(yellow)

-L (MONO) (white)

-R (red)

Audio/Video cable (not supplied)

Rear of TV

Connecting a VCR

To watch the video input, press t (see page 14).

KV-XG29M81/XG29M80/XG25M80

: Signal flow

or

Antenna cable

(not supplied)

Antenna cable

(not supplied)

(yellow)

-L (MONO) (white)

-R (red)

To video

and audio

outputs

Audio/Video cable (not supplied)

To t 1 (video input)

To 8 (antenna)

To antenna output

: Signal flow

VCR

KV-XA21M83/XA21M80

Antenna cable (not supplied)

To antenna output

VCR

To

t

1 or 2 (video input)

Rear of TV

To 8 (antenna)

Using Your New TV

5

Step 2

Note

• Do not use old batteries nor use different types of batteries together.

Front of TV

Notes

• If you connect a monaural VCR, connect the yellow plug to

(the

yellow jack) and the black plug to

-L (MONO) (the white jack).

• If you connect a VCR to the 8 (antenna) terminal, preset the signal

output from the VCR to the program number 0 on the TV.

• When no signal is input from the connected video equipment, the TV

screen becomes blue.

KV-XG29M81/XG29M80/XG25M80 only

• Do not connect video equipment to the t 2 (video input) jacks at the

front and the rear of your TV at the same time; otherwise the picture will

not be displayed properly on the screen.

CAUTION

• Do not connect the power cord until you have completed making all other

connections; otherwise a minimum leakage current might flow through

the antenna and other terminals to ground.

• To avoid battery leakage and damage to the remote, remove the batteries

from the remote if you are not going to use it for several days. If any

liquid that leaks from the batteries touches you, immediately wash it

away with water.

Insert the batteries

into the remote

Step 3

Preset the channels automatically

Tips

• If you want to stop automatic channel presetting, press SELECT twice.

• If your TV has preset an unwanted channel or cannot preset a particular

channel, then preset your TV manually (see page 11).

Note

• During automatic channel presetting, your TV screen will indicate

“B/G” , “I”, “D/K” or “M” for the TV system (TV SYS).

AUTO

PROGR

1

VHF LOW B/G

1

2

L(MONO) R

PROGR

SELECT

AUTO

PROGR

!

RM-952

– 9 –

KV-XG25M80

Using Your New TV

6

Connecting the TWEETER

(KV-XA21M83 only)

You can enjoy high quality sound by connecting the TWEETER.

1

Place the TWEETER on top of your TV.

2

Bend the wire to hook it at the side of your TV.

3

Connect the wires to the TWEETER terminals at the rear of your TV. The

plain wire should be connected to the 3 red terminal and the striped wire

to the # black terminal.

Notes

• Connect only the supplied TWEETER; otherwise your TV may

malfunction.

• Unplug your TV from the wall outlet when connecting the TWEETER.

• To prevent a malfunction caused by a short circuit of the terminals, make

sure that none of the TWEETER wire strands stick out, making contact

with the neighbouring TWEETER terminal.

TWEETER (8 )

–

L

++

R

–

TWEETER

TWEETER (8 )

– L +– R +

Striped

wire

Plain

wire

1

2

3

Using Your New TV

8

Note

• If you connect a monaural VCR, connect the yellow plug to

(the yellow

jack) and the black plug to

-L (MONO) (the white jack).

KV-XA21M83/XA21M80

(yellow)

-L (MONO) (white)

-R (red)

Rear of TV

To

antenna

output

To video and

audio inputs

or

Audio system

To

audio

inputs

VCR

: Signal flow

To T

(monitor output)

Antenna cable (not supplied)

Audio/Video cable (not supplied)

L(MONO)

1

Connecting optional components (continued)

RM-952

– 10 –

KV -XG25M80

Using Your New TV

9

Securing the TV

To prevent the TV from falling, secure the TV using one of the following methods:

A

With the supplied screws, attach the band to the TV stand and to the rear of

the TV using the provided hole.

or

B

Put the cord or chain through the clamps to secure the TV against a wall or

pillar.

Note

• Use only the supplied screws. Use of other screws may damage the TV.

or

20

mm

3.8 mm

A

B

Using Your New TV

10

Presetting

channels

You can preset up to 100 TV channels in

numerical sequence from program

number 1 using the remote and the

buttons on your TV as well.

Presetting channels automatically

1

Press ! to turn on the TV.

2

Press AUTO PROGR.

Note

• During automatic channel presetting, your TV screen will indicate

“B/G”,

“I”, “D/K” or “M” for the TV system (TV SYS).

To preset channels automatically from a specified program number

(1) Press SELECT until

“AUT

O PROGRAM” appears.

(2) Press + or –.

The on-screen display will start flashing.

(3) Press PROGR +/– or the number buttons until the desired program number

appears.

(4) Press + or –.

Number buttons

?/

1

SELECT

2 +/–

PROGR +/–

+ or –

PIC MODE

TV

1

2

3

4

6

7

8

9

÷

0

5

JUMP

SOUND

MODE

FAVORITE

PROGR

Á

VHF

LOW

B/G

2

L(MONO) R

PROGR

SELECT

AUTO

PROGR

AUTO

PROGR

!

RM-952

– 11 –

KV-XG25M80

Using Your New TV

11

Presetting channels manually

1

Press SELECT until

“MANUAL PROGRAM”

appears.

2

Press + or –.

3

Press PROGR +/– or the

number buttons until the

desired program number

appears.

4

Press + or – until the

desired channel picture

appears.

5

Press SELECT.

Note

• If you preset a locked program number, that particular program number

will be unlocked automatically (page 20).

To change the TV system setting

If the picture or sound is abnormal when receiving programs through the

8

(antenna)

terminal

(1) Press SELECT until

“TV SYS” appears.

(2) Press + or – to select the appropriate

TV system until the picture or sound

quality is optimal.

or

MANUAL PROGRAM

SELECT

VHF

LOW

B/G

1

2

3

4

5

6

7

8

0

-/--

9

PROGR

SELECT

1

B/G

ID/K

M

TV SYS: B/G

continued

Using Your New TV

12

To change the color system setting

If the color is abnormal when receiving programs through the

8

(antenna) terminal

or the

t

(video input) jack.

(1) Press SELECT until

“COLOR SYS” appears.

(2) Press + or – to select the appropriate

color system until the color is

optimal.

Tip

• Normally set “COLOR SYS” to “AUT

O”.

Skipping program numbers

1

Press PROGR +/

– or the number buttons until the unused or unwanted

program number appears.

2

Press SELECT until

“MANUAL PROGRAM

” appears.

3

Press + or –.

4

Press PIC MODE.

5

Press SELECT.

To restore the skipped program number again

Preset the channel automatically or manually.

Tip

• You can also use SELECT and

2

+/– on the TV to preset channels and

skip program numbers.

To use the fine tuning (FINE) function

The fine tuning (FINE) function may help to reduce the following problems:

incomplete Teletext display (KV-XG29M81 only), double images and lines moving

across the TV screen.

You can use the fine tuning function as below:

(1) Select the program number you want to adjust.

(2) Press SELECT until

“MANUAL

PROGRAM” appears on the screen.

(3) Press + or – on the remote control once.

(4) Press

to display “FINE” on the scr

een.

(5) Press + or – continuously until the above problems are minimized.

The + or – icon on the screen flashes while tuning.

(6) Press SELECT to return to normal screen.

COLOR SYS: AUTO

AUTO

PAL SECAM

NTSC 3.58NTSC 4.43

Presetting channels (continued)

RM-952

– 12 –

KV -XG25M80

Using Your New TV

13

Watching the TV

This section explains functions used

while watching the TV. Most operations

can be done using the remote.

1

Press

!

to turn on the TV.

When the TV is in the

standby mode (the

1

indicator on the TV is lit

red), press

?/1

on the

remote or PROGR +/

– on

the TV.

2

Press PROGR +/

– or the

number buttons to select

the program number .

For double digit numbers,

press -, then the number

(e.g., for 25, press -, then

2 and 5).

3

Press

2

+/– to adjust the

volume.

or

1

indicator

%

?/

1

t

a

Number buttons

SELECT

2 +/–

PROGR +/–

+ or –

JUMP

TV

1

2

3

4

6

7

8

9

÷

0

5

JUMP

SOUND

MODE

FAVORITE

PROGR

Á

1

2

3

4

5

6

7

8

0

-/--

9

PROGR

continued

2

L(MONO) R

PROGR

SELECT

AUTO PROGR

PROGR

SELECT

AUTO

PROGR

!

Using Your New TV

14

Watching the TV (continued)

To

Turn off temporarily

Turn off completely

Mute the sound

Watch the video input

(VCR, camcorder, etc.)

Jump back to the previous program

number

Display the on-screen information*

Adjust the volume of all

program numbers automatically

Adjust the picture position when it

is not aligned to the TV screen

(KV-XG29M81/XG29M80/

XG25M80 only)

Additional tasks

* The picture, sound, and either the program number or video input are

displayed. The on-screen display for the picture and sound information

disappears after about three seconds.

Changing the on-screen display language

1

Press SELECT until

“LANGUAGE /

:

ENGLISH”appears on the

screen.

2

Press + or – to select

“

“.

Tip

• You can also use SELECT and 2 +/– on the TV to select the on-screen

display language.

PIC ROTATION

LANGUAGE / : ENGLISH

SELECT

LANGUAGE / :

Press

?/

1. The 1 indicator on the TV lights up red. ! on the TV.

%.

t to select “VIDEO 1” or “VIDEO 2”.

To return to the TV program, press a.

JUMP.

.

SELECT repeatedly until

“INTELLIGENT VOL

”

appears, then press + or – to select “ON”.

To cancel, select “OFF”.

SELECT repeatedly until

“PIC ROT

ATION” appears,

then press + or – to adjust the alignment of the picture

position.

The

+

or

icon on the screen flashes while adjusting.

RM-952

– 13 –

KV-XG25M80

Using Your New TV

15

Setting the Wake Up timer

1

Press

until the desired

period of time appears.

The Wake Up timer starts

immediately after you have

set it.

2

Select the program number or video input you want to display when you

wake up.

3

Press ?/1 or set the Sleep timer if you want the TV to turn off automatically.

The

indicator on the TV lights up orange.

To cancel the Wake Up timer

Press

until “WAKE UP TIMER: OFF” appears or turn off the TV’s

main power.

Note

• If no buttons or controls are pressed for more than two hours after the

TV is turned on using the Wake Up timer, the TV automatically goes into

the standby mode. To continue watching the TV, press any button or

control on the TV or the remote.

Setting the Sleep timer

Press

until the desired

period of time appears.

The Sleep timer starts

immediately after you have

set it.

To cancel the Sleep timer

Press

until “SLEEP TIMER: OFF” appears or turn the TV of

f.

WAKE UP TIMER:10M

WAKE UP TIMER:OFF

WAKE UP TIMER:12H00M

After 10 minutes

No Wake Up timer After 12 hours

SLEEP TIMER:30M

SLEEP TIMER:60M

SLEEP TIMER:OFF

SLEEP TIMER:90M

After 30 minutes

No Sleep Timer

After 60 minutes

After 90 minutes

Advanced Operations

16

Customizing the

picture and sound

You can customize the picture and

sound by selecting the picture and

sound modes or by adjusting its

settings.

You can change the sound effect by

selecting the surround mode.

Selecting the picture and sound modes

To select the picture mode

Press PIC MODE

repeatedly until you get

the desired picture mode.

Select To

“DYNAMIC” receive high contrast pictures.

“STANDARD” receive normal contrast pictures.

“SOFT” receive mild pictures.

To select the sound mode

Press SOUND MODE

repeatedly until you get

the desired sound mode.

Select To

“DYNAMIC” listen to dynamic and clear sound that emphasizes the low and

high sound.

“DRAMA” listen to sound that emphasizes vocals and background music.

“SOFT” receive soft sound.

Advanced Operations

TV

÷

0

JUMP

SOUND

MODE

FAVORITE

PROGR

Á

STANDARDDYNAMIC

SOFT

PIC MODE

≥

DYNAMIC

≥

DRAMA

≥

SOFT

SOUND

MODE

SOUND MODE

PIC MODE

SELECT

+ or –

RM-952

– 14 –

KV -XG25M80

Advanced Operations

17

Adjusting the picture and sound settings

1

Press SELECT until the

desired setting appears.

Each time you press

SELECT, the setting

item will change as follows:

2

Press + or – to adjust the

item.

3

To adjust other items, repeat steps 1 to 2.

* “HUE” can be adjusted for the NTSC system only.

Notes

• When you select a picture or sound mode, the adjusted settings will be

reset according to the selected mode.

• You can also use SELECT and

2

+/– on the TV to adjust the picture and

sound settings.

SELECT

PICTURE 60

PICTURE COLOR

BRIGHT

HUE*

BALANCE TREBLE

BASS

SHARP

Advanced Operations

continued

Advanced Operations

18

Selecting the surround mode

KV-XG29M81/XG29M80/XG25M80

1

Press SELECT repeatedly

until “SURROUND”

appears.

2

Press + or – to select the

desired surround sound.

Select To

“MOVIE” listen to sound that spreads out over a large area, giving the feeling

of being at a movie theatre.

“MUSIC” listen to the sound that gives the feeling of being at a live concert.

“OFF” turn off the surround sound.

SURROUND: MOVIE

SELECT

MUSICMOVIE

OFF

KV-XA21M83/XA21M80

1

Press SELECT repeatedly

until “SURROUND”

appears.

2

Press + or – to select “ON”.

To turn off the surround

mode, select “OFF” .

SURROUND: ON

SELECT

ON

OFF

Customizing the picture and sound (continued)

RM-952

– 15 –

KV-XG25M80

Advanced Operations

19

Viewing your

favorite channels

You can display six of your favorite

channels for quick and easy selection.

You can program the favorite channel as

well.

Selecting a favorite channel

1

Press FAVORITE.

2

Press the number button

from 1 to 6 to select the

desired favorite channel.

When you use the

“F

AVORITE CH”

feature for the first time, six preset channels will appear.

1

2

3

4

6

7

8

9

÷

0

5

JUMP

SOUND

MODE

FAVORITE

PROGR

Á

FAVORITE

+ or –

PROGR +/–

Number

buttons

Programming the favorite channel

1

Press PROGR +/

– or

number buttons to select

the program number you

want to program (e.g.,

program number 8).

2

Press SELECT until

“FAVORITE CH SETUP

”

appears.

3

Press + or – to select the

favorite channel you want to

program (e.g., 3).

4

Press SELECT.

The selected favorite channel (e.g.,3)

turns red for about one second.

5

To program other favorite channels, repeat steps 1 to 4.

or

FAVORITE

FAVORITE CH

1PR01 2 PR02 3 PR03

4PR04 5 PR05 6 PR06

1

2

3

4

5

6

1

2

3

4

5

6

7

8

0

-/--

9

PROGR

8

SELECT

FAVORITE CH SETUP :

SELECT

RM-952

– 16 –

KV -XG25M80

Additional Information

24

• Check the antenna cable and connection

on the TV, VCR and on the wall.

• Press SELECT until

“MANUAL

PROGRAM” appears on the screen, then

preset the channel again.

• Check the antenna type (VHF/UHF).

Contact a Sony dealer for advice.

• Adjust the antenna direction. Contact a

Sony dealer for advice.

• Try using a booster.

• Turn off or disconnect the booster if it is

in use.

• If the sound of some channels are noisy,

select the channel, then select the

appropriate TV system (TV SYS).

• Check the power cord, antenna and the

VCR connections.

• Press ?/1 (power).

• Press ! (main power) on the TV to turn

off the TV for about five seconds, then

turn it on again.

Snowy picture

Noisy sound

Distorted picture

Noisy sound

Good picture

Noisy sound

No picture

No sound

Troubleshooting

If you find any problem while viewing your TV, please check the following guide. If

any problem persists, contact your Sony dealer .

Possible causeSymptom

Solutions

• Connection is loose or

the cable is damaged.

• Channel presetting is

inappropriate or

incomplete.

• The antenna type is

inappropriate.

• The antenna direction

is inappropriate.

• Signal transmission is

low.

• Broadcast signals are

too strong.

• The TV system setting

or channel presetting

is inappropriate or

incomplete.

• The power cord,

antenna or VCR is not

connected.

• The TV is not turned

on.

Page

4

11

–

11

4

14

13

Additional Information

25

Good picture

No sound

Dotted lines or

stripes

Double images or

“ghosts”

No color

Abnormal color

patches

• Press 2 + to increase the volume level.

• Press % to cancel the muting.

• Do not use a hair dryer or other

equipment near the TV.

• Adjust the antenna direction for

minimum interference. Contact a Sony

dealer for advice.

• Use a highly directional antenna.

• Use the fine tuning (FINE) function.

• Adjust the antenna direction. Contact a

Sony dealer for advice.

• Turn off or disconnect the booster if it is

in use.

• Press SELECT until

“COLOR” appears

on the screen, then press + or – to adjust

the color level.

• Press SELECT until

“COLOR SYS ”

appears on the screen, then check the

color system setting (usually set this to

“AUTO”).

• Adjust the antenna direction. Contact a

Sony dealer for advice.

• Keep external speakers or other electrical

equipment away from the TV. Do not

move the TV while the TV is turned on.

Press ! (main power) on the TV to turn

off the TV for about five minutes, then

turn it on again.

Possible cause

Symptom

Solutions

continued

• The volume level is

too low.

• The sound is muted.

• There is local

interference from cars,

neon signs, hair

dryers, power

generators, etc.

• Broadcast signals are

reflected by nearby

mountains or

buildings.

• The antenna direction

is inappropriate.

• Use of a booster is

inappropriate.

• The color level setting

is too low.

• The color system

setting is

inappropriate.

• The antenna direction

is inappropriate.

• The magnetic

disturbance from

external speakers or

other equipment, or

the direction of the

earth’s magnetic field

may affect the TV.

13

14

–

12

–

17

12

–

Page

RM-952

– 17 –

KV-XG25M80

Additional Information

26

21

4

–

12

–

14

12

23

–

“100” appears on

the top of the

screen and there is

no Teletext display.

(KV-XG29M81 only)

Teletext display is

incomplete

(snowy picture or

double images).

(KV-XG29M81 only)

Picture slant

(KV-XG29M81/

XG29M80/XG25M80

only)

Lines moving across

the TV screen.

The

1

indicator on

your TV flashes red

a number of times

between 3-second

intervals.

TV cabinet creaks.

A “boom” sound is

heard when the TV

is turned on.

Troubleshooting (continued)

Possible causeSymptom Solutions

• The channel carries no

Teletext broadcast.

• Connection is loose or

the cable is damaged.

• The antenna direction

is inappropriate.

• Signal transmission is

too low.

• The magnetic

disturbance from

external speakers or

other equipment, or

the direction of the

earth’s magnetic field

may affect the TV.

• There is interference

from external sources,

e.g., heavy

machineries, nearby

broadcast station.

• Your TV may need

service.

•

Changes in room

temperature

sometimes make the

TV cabinet expand or

contract, making a

noise. This does not

indicate a malfunction.

• The TV’s

demagnetizing

function is working.

This does not indicate

a malfunction.

Page

—

•Check the antenna cable and connection

on the TV, VCR, and at the wall.

•Adjust the antenna direction. Contact a

Sony dealer for advice.

•Try using a booster.

•Use the fine tuning (FINE) function.

•Keep external speakers or other electrical

equipment away from the TV.

•Press SELECT until

“PIC ROT

ATION”

appears on the screen, then press + or –

to align the picture to the TV screen.

•Use the fine tuning (FINE) function.

•Contact your nearest Sony service center.

—

Additional Information

27

Overview of controls

TV front panel

KV-XG29M81/XG29M80/XG25M80

PROGR

SELECT

AUTO

PROGR

2

(

MONO

)

KV-XA21M83/XA21M80

Page

Function

Button

Preset channels automatically.5

Select the desired item. 12

Select program number. 13

Turn off completely or turn on 13

the TV.

Adjust volume. 13

Standby indicator.13

Select TV or video input. 14

Wake Up indicator.15

Headphone jack. –

AUTO PROGR

SELECT

PROGR +/–

!

2 +/–

1

t

i

2

L(MONO) R

PROGR

SELECT

AUTO

PROGR

2

L(MONO) R

PROGR

SELECT

AUTO

PROGR

!

continued

RM-952

– 18 –

KV -XG25M80

Additional Information

28

Remote Control

TV

1

2

3

4

6

7

8

9

÷

0

5

JUMP

SOUND

MODE

FAVORITE

PROGR

Á

The names/symbols of

buttons on the remote are

indicated in different colors to

represent the available

functions.

Label color

White

Green

Button function

For general TV

operations

For Teletext

operations

Page

Button Function

Overview of controls (continued)

SELECT

+/–

PROGR +/–

0 – 9, -

2 +/–

?/1

t

a

%

JUMP

Timer operations

PIC MODE

SOUND MODE

FAVORITE

Stereo/bilingual operations (Not used for

KV-XG29M81/ XG29M80/XG25M80/XA21M83/

XA21M80)

A/B

Teletext operations

(KV-XG29M81 only)

x

(red, green,

yellow, blue)

Select the desired item. 11

Adjust value. 11

Select program number. 13

Input numbers. 13

Adjust volume. 13

Turn off temporarily or 13

turn on the TV.

Select TV or video input. 14

Display the TV program. 14

Mute the sound. 14

Display on-screen information.

14

Jump to previous program 14

number.

Set TV to turn on automatically.

15

Set TV to turn off automatically.

15

Select picture mode. 16

Select sound mode. 16

Display favorite channels. 19

Select stereo/bilingual mode. –

Display Teletext broadcast. 21

Display Teletext service contents.

22

Stop Teletext display from 22

scrolling.

Reveal concealed information. 22

Enlarge the Teletext display. 22

Show TV screen while 22

waiting for Teletext page.

Access a FASTEXT menu. 22

Additional Information

29

Power requirements 110-240 V AC, 50/60 Hz

Power consumption (W)

Indicated on the rear of the TV

Television system B/G, I, D/K, M

Color system PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58

Teletext language

English, Arabic, French KV-XG29M81 only

Channel coverage

B/G VHF : E2 to E12

UHF: E21 to E69

CATV : S01 to S03, S1 to S41

I UHF : B21 to B68

CATV : S01 to S03, S1 to S41

D/K

VHF: C1 to C12, R1 to R12

UHF : C13 to C57, R21 to R60

CATV : S01 to S03, S1 to S41, Z1 to Z39

M VHF : A2 to A13

UHF: A14 to A79

CATV : A-8 to A-2, A to W+4, W+6 to W+84

8 (Antenna) 75-ohm external terminal

Audio output 5W + 5W

(Speaker)

5W + 5W (TWEETER supplied) KV-XA21M83 only

Number of terminal

(Video)

Input: 2 Output: 1 Input: 3* Output: 1 Input: 3* Output: 1

*

Two input lines

available

Phono jacks;

1Vp-p, 75 ohms

(Audio)

Input: 2 Output: 1 Input: 3* Output: 1 Input: 3* Output: 1

*

Two input lines

available

Phono jacks;

500 mVrms

i (Headphone) Output: 1 Output: 1 Output: 1 Stereo minijack

Picture tube 21 in. 25 in. 29 in.

Tube size (cm) 54 64 72

Measured diagonally

Screen size (cm) 60 60 68

Measured diagonally

Dimensions (w/h/d, mm)

620 × 452 × 496 722 × 515 × 512 794 × 573 × 517

Mass (kg) 26 39 48

Sony Corporation

Specifications

Design and specifications are subject to change without notice.

Note

KV-XA21M83

KV-XA21M80

KV-XG25M80

KV-XG29M81

KV-XG29M80

RM-952

– 19 –

KV-XG25M80

RM-952

MEMO

○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

– 20 –

KV -XG25M80

2 Eight screws

(+BVTP 4

× 16)

3 Three screws

(+BVTP 4

× 16)

1 Rear cover

Three screws

(Step Tapping)

1 Chassis assy

Control button

Two screws

(+BVTP 3 × 12)

One screw

(+BVTP 3 × 12)

RM-952

SECTION 2

DISASSEMBLY

2-3. CHASSIS ASSY REMOVAL

2-2. SPEAKER REMOVAL

2-5. REPLACEMENT OF PARTS

For replacement of the Control Button and Light Guide,

unscrew them, exchange with the new parts, and fix them

2-5-2. REPLACEMENT OF LIGHT GUIDE

with screws (+BVTP) respectively.

2-5-1. REPLACEMENT OF CONTROL BUTTON

2-1. REAR COVER REMOVAL

2-4. SERVICE POSITION

– 21 –

KV-XG25M80

3 Two claws

4 Terminal bracket

1 Two screws

(+ BVTP 3 × 12)

2 One screw

(+ BVTP 4 × 16)

3 Two connectors

4 One screws (+BVTAP 3

× 12)

1 Two connectors

4 Four claws

5 H2 Board

2 Two connectors

4 B6 Board

5 A Board

1 Three screws

(+BVTAP 3

× 12)

2 Three screws

(+BVTAP 3

× 12)

RM-952

2-8. A AND B6 BOARDS REMOVAL

2-7. H2 BOARD REMOVAL

2-6. TERMINAL BRACKET REMOVAL

– 22 –

KV -XG25M80

!º Four DGC clips

!¢ Degaussing coil

9 Four claws

1 Three screws

(Step Tapping)

!™ Two screws

(Tapping)

5 Chassis assy

8 Deflection

yoke

7 Neck assy

6 C6 board

4 Anode cap

!¡ Picture tube

Cushion

!™ Two screws

(Tapping)

!£ Tension

spring

DGC holder

Cushion (50 × 250)

DGC

Cushion (50 × 250)

DGC

2 Speaker

1 Three screws

(Step Tapping)

Anode button

a

b

c

RM-952

the anode cap to the metal chassis, CRT shield or carbon paint on the

CRT.

•REMOVAL OF ANODE-CAP

NOTE : After removing the anode, short circuit the anode of the picture tube and

•REMOVING PROCEDURES

1 Turn up one side of the rubber cap in the direction indicated by the arrow a.

can be removed by turning up the rubber cap and pulling it up in the direction of the

arrow c.

3 When one side of the rubber cap is separated from the anode button, the anode-cap

• HOW TO HANDLE AN ANODE-CAP

2 Using a thumb pull up the rubber cap firmly in the direction indicated by the arrow b.

A metal fitting called the shatter-hook terminal is built into the rubber.

The shatter-hook terminal will stick out or damage the rubber.

1 Do not damage the surface of anode-caps with sharp shaped objects.

2 Do not press the rubber too hard so as not to damage the inside of anode-cap.

3 Do not turn the foot of rubber over too hard.

2-9 PICTURE TUBE REMOV AL

– 23 –

Sony KV-XG25M80 Service manual

KV-XG25M80 RM-952 ME SCC-U48E-A

SPECIFICATIONS

TABLE OF CONTENTS

SELF DIAGNOSTIC FUNCTION

GENERAL

DISASSEMBLY